Scaffold-tie



{NO 1 J T SGAFFOLD TIE.

No. 263,426. Patented Aug. 29, 1882.

Jill lllll UNITED STATES PATENT OFFICE.

JOHN T. OBRIEN, OF PHILADELPHIA, PENNSYLVANIA.

SCAFFOLD-TIE.

SPECIFICATION forming part of Letters Patent No. 263,426, dated August29, 1882.

Application filed June 6, 1882. (No model.)

To all whom it may concern Be it known that I, JOHN T. OBRIEN, a citizenof the United States, residing at Philadelphia, in the county ofPhiladelphia and State of Pennsylvania, have invented a new and usefulTie for Scaffolding, 850., of which the following is a specification.

My invention relates to splicing, bracing, extending, 850., the timberand material used in the construction of portable and stationaryscaffolding, which objects are attained by the device illustrated in theaccompanying drawings, in which- Figure 1 is a perspective view of thetie in combination with a scaffold cross-bar and upright. Fig. 2 is aperspective view of the tie in combination with spliced uprights andstrengtheningpicoes. Fig. 3 is a perspective view of the head,projections, and washer. Fig. 4 is a perspective view ot'thebinding-bolt. Fig. 5 is a perspective view of the tie in connection witha cross-bar and upright. In this view the tie is shown single, or withonly two projections, and the washer of a single plate or strip.

-. Theinvention consists in the combination of a head, A, having asuitable number of legs or projections, B, a washer or plate, 0, and abinding-bolt, D. The ends ofthelegs B extend into openings a,formed inthe washer, whereby they are held from spreading laterally by theworking and jarring of the timbers of the scaffolding. The bolt D passesthrough the timbers, and when the nut E is firmly screwed in place thewhole is securely bolted together.

In Fig. 1 the tie supports the cross-bar F and binds to the upright G.In Fig.2 the uprights G- are spliced for extending. The jointorbuttbisstrengthenedbysidepieces,H. Two ties are used in this instance,above and below the butt I). If the scafiold is of limited height, forceiling and other indoor work, the side pieces, H, can be dispensedwith, and but one tie used, by arranging its extensions B above andbelow the joint I) and using the holes 0 for bolts.

The tie Figs. 1, 2, 3'has four projections, B, from parallels 11, joinedby diagonals e, oravertical,f, (dotted lines.) In Fig. 5 the tie isshown with a single bar or head, A, two extensions, B, a bolt, D, and awasher, G. A slot and key can in some instances be employed in place ofthe nutand screw-thread on. bolt D.

I claim A timber-tie composed of a head, A, binding-projections B, awasher, G, and a tightening-bolt, D, or key, for the purpose shown anddescribed.

In testimony whereof I hereunto sign my name in presence of twosubscribing witnesses.

JOHN T. OBRIEN.

Witnesses FRANCIS D. PASTORIUS, CHAS. F. VAN HORN.

